I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
ply paly poly play pily ploy pally pul pulley pal pol pillowy peel pale pili pule pele polo pawl pall pail pull plea plow pial poll pill pula plew pool puli pile plie pole peal pilea pilei poilu pilaw polio palea pilau paella paleae pallia pillow pollee